BFe10-1-1铜合金热压缩流变应力行为  

Flow stress behaviors of BFe10-1-1 copper alloy during hot compression

作　　者：林高用[1,2] 周佳[1,2] 孙利平[1,2] 张振峰[1,2] 张胜华[1,2] 

机构地区：[1]中南大学材料科学与工程学院 [2]有色金属材料科学与工程教育部重点实验室,长沙410083

出　　处：《材料科学与工艺》2009年第3期441-444,共4页Materials Science and Technology

基　　金：江苏省科技成果转化项目资助(DA2006034)

摘　　要：BFe10—1—1合金管是制造冷凝器的关键材料，主要采用热挤压方法成形．为了制定该合金的热挤压工艺，并为其挤压成形的数值模拟分析提供热力学参数，在Gleeble-1500动态热模拟机上进行高温等温压缩试验，研究了BFe10-1—1合金在高温塑性变形过程中的流变应力行为．试验温度为800～950℃，应变速率为0．1—20S^-1．研究结果表明，BFe10-1—1合金的流变应力随变形温度的增加而减小，随应变速率的增大而增大；随着应变速率越大，动态再结晶软化现象更为明显；获得了采用Zener—Hollomon参数来描述的BFe10—1—1合金高温变形的峰值应力方程，计算获得该合金变形激活能Q为182．68kJ／mol．BFel0 - 1 - 1 alloy tube which is mainly produced by hot extrusion is the critical material for manufacturing condenser. In order to develop the hot extrusion process of BFel0 - 1 - 1 alloy tube and provide thermodynamic parameters for numerical simulation analysis of extrusion, the flow stress behaviors of BFe10 - 1 - 1 copper alloy during plastic deformation at elevated temperature were studied by performing the isothermal compression test on Gleeble - 1500 simulator at 800 - 950 ℃ in the strain rate range of 0. 1 - 20/s. The experimental results show that the flow stress of BFe10 - 1 - 1 alloy is decreased with the increase of deformation temperature, while it is enhanced with the increase of strain rate. The peak stress equation of BFe10 - 1 - 1 alloy during high temperature deformation is obtained by Zener hollomon parameter, and the calculated hot deforming activation energy of this alloy is 182.68 kJ/mol.

关 键 词：BFe10-1—1合金 热压缩变形 流变应力 Zener—Hollomon参数 

分 类 号：TG319[金属学及工艺—金属压力加工] TG146.1[一般工业技术—材料科学与工程]